Exhibit 23.1


                         CONSENT OF ERNST & YOUNG LLP


We consent to the incorporation by reference in the Registration Statement on
Form S-8 (Registration No. 333-43385) pertaining to our report dated June 4,
1999, with respect to the financial statements and schedules of the Tuboscope
Vetco International Inc. 401(k) Thrift Savings Plan included in this Annual
Report on Form 11-K for the year ended December 31, 1998.



/s/Ernst & Young LLP

Houston, Texas
June 22, 1999